On 18/12/2018 15:29, David Engel wrote:
> On Tue, Dec 18, 2018 at 09:56:40AM -0500, Peter Bennett wrote:
>> I have had a report of mediacodec playback locking up with interlaced h264
>> on a firestick 4k. I have been using the fire stick for a lot of playback of
>> progressive h264 without problems. It seems that interlaced content may be
>> what is causing the issue.
>
> FWIW, I let mine run for ~35 minutes on h.264/1080i this weekend as a
> test. No issues found. I can try to let it run longer this evening
> if it would help.
>
> David
Mine had an update on Friday, too. With MediaCodec decoding it still
reliably locks up at the end of the station ident on the recording (BBC
FOUR HD, DVB-T2, Feb 2016) from which I took the clip posted earlier.
After what seems a long time it quits with 'Video frame buffering
failed too many times.'
With standard decoding nothing seems wrong and the playback quality is
excellent. I have looked at adb log output in both cases but see
nothing that seems unusual at the position where things lock up.
--------------
ISTR that mythtranscode used to have problems when subsidiary streams
would suddenly start up or close. That could perhaps be what is
happening here. In the sample I posted there was no obvious event in
the main streams that coincided with the failure, but it was close to
the end of the programme. The one I mentioned above was at the start of
the content. Stream analyses around the fail points might be useful; at
present I don't know the easiest way to do that and I can't record from
the HD channels.
----------------------
https://www.mediafire.com/file/ah09b5pzh1o5ggy/firestick_itvHD.ts/file is a longer file cut from a recording made this year. It plays in
mythfrontend on the firestick with the Standard decoder but sticks at
'Please wait' with MediaCodec. It plays with my nVidia card too.
-----------
And it plays with the android-for-firestick VLC, with differences in the
picture for the various acceleration options.
Here are ffprobe results for the two clips.Sometime next year, when I've
finished reading ffprobe --help, I might be able to look at different
testpoints. I'm posting only grepped results, and without the
multicoloured error preamble.
mythffprobe -hide_banner -v error -show_streams -show_format -of json
firestick_test_h264.ts | grep field
"field_order": "progressive",
mythffprobe -hide_banner -v error -show_streams -show_format -of json
firestick_itvHD.ts | grep field
"field_order": "tt",
HTH,
John P
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